Measurement of sky clarity using MIR radiometers as an adjunct to atmospheric Čerenkov radiation measurements

Abstract

A technique for detecting the presence of cloud in the field of view of an atmospheric Cerenkov telescope using a far infra red radiometer is described. Models for the radiative emission from clear and cloudy skies are tested and found to represent the measurements.Comment: 13 pages, 10 figures, submitted to Experimental Astronom